Quest for highly connected
metal–organic framework platforms: rare-earth polynuclear clusters versatility meets net 
topology needs  
D. Alezi, A.M.P. Peedikakkal, Ł.J. Weseliński, V. Guillerm, Y. Belmabkhout, A.J. Cairns, Z. Chen, Ł. Wojtas, and M. Eddaoudi 
J. Am. Chem. Soc., 137 (16), pp 5421–5430, (2015)
http://fmd3.kaust.edu.sa/Pages/pub-2015-QHC.aspx